Parking brake



June 7, 1938. e. F. KLAMPFERER PARKING BRAKE Filed March 17, 1956 3 Sheets$heet I June 7, 1938. Q a. F. KLAMISF'ERER PARKING BRAKE Filed March 17. 1936 3 Sheets-Sheet 2 June 7, 1938.

G. F. KLAMPFERER PARKING BRAKE Filed March 17, 1936 3 Sheets-Sheet 3 Patented June 7, 1938 r I I Q UNITED STATES PATENT oFFics Appllcationzltgzclzal'l,(gifflzieliz No. 89,28d

My invention relates to brake controlling of the invention, the numeral denotes the sermechanism and has for its primary object to pro- :vice brake pedal 01 an automobile having thev vide means for holding the foot brake of an 'auusual shank 8. In accordance withthe present tomobile applied, while the machine is at rest invention, the rear edge of the shank 6 has 5 thus eliminating the need for an emergency formed therein aseries o'f ratchet teeth! adapted 5 brake. to -be engaged by the locking dog 8 pivotally A further object of the invention is to provide mounted on the pin 9 supported in the side walls automatic means for locking the foot pedal oper- 0f the sheet m tal b ac et 0. v e bra ket 0 ating the service brakes of an automobile in a' is attached to the floor board ll of an automobile,

i0 depressed position, so the brakes will remain apby means of bolts l2 and has its lower end, in lo plied and manually operable means for controlwhich the pin 9 is uppo ted d sposed adjacent ling the automatic means I the shank of the brake pedal. A bell crank lever Another object of the invention is to provide '3 is u ted n e S t pp y the a mechanism of the above-mentioned character side walls of the bracket l0 above the dog 8 and which is simple and durable in construction,.rehas a e v arm e ed at its free 15 liable and efficient in operation and inexpensive nd. as at IE, to one end of a flexible cable or rod t manufacture, it and a short arm in the form of a cam I! which Other objects and advantages of the invention C ntacts W th the p 0 the follower p t \will be apparent during the course oi. the followhaving depending S de flanges l9 disp sed i ing d scri ti n, straddling relation to the dog 8 and pivotally In the accompanying drawings, forming a part unted n t e P 9- The deg 3 and plate of this specification and in which like numerals a e y elda y Connected together by a U Spring are employed to designate like parts throughout 0 ed of Wire which is bent O d the P th same, 9 and has one end connected to the plate H, as at Fig. 1 is a side elevation of the mechanism, d its pp i e e d Co ted to t d 8. 25

Fig, 2 is a. rear view of the same, as at 22. A coil spring 23 is mounted on the pin Fig. 3' is a section taken on line 3- 3 of Fig. 2, 9 having one end connected 'to the side wall of Fig. 4 is a section taken on line 4-4 of Fig. .3, the bracket II), as at 24, and its opposite end Fig, 5 1s a, side elevation of another form of connected to the flange is (if the plate '8, which mechanism, v normally urges the dog 8 and plate I8 away from 30 Fig. 6 is a side elevation of still another form e Shank 6 0 t p d n e ectric switch 25- of mechanism, 1 which is interposed in the circuit of the conven- Fig. 7 is a longitudinal section taken on line tional stop lig s di p d ja t e ev 3.

1--1 of Fig. 6, so that the cam II ,will engage the push button Fig. 8 is a side elevation of still another form 26 oi the switch to close the circuit when the lever 35 of the mechanism, is actuated. The flexible cable It extends Fig.- 9 is a top view of the mechanism shown in through a c du t 21 t0 the dash board 2 8 of Fig; 8, 1 the automobile and is connected to the shank 29 Fig. 10 is a vertical section taken on line Ill-Ill of a hand knob 30, the Shank being ly 0 of Fig, 3, mounted in a sleeve'3l, mounted in the dash- Fig. 11 is a side elevation of a further. modified board. v form of the invention, To operate, the hand knob 30 is pulled out- Fig. 12 is an enlarged side elevation of the latch wardiy from the dashboard which through the mechanism shown in Fig. 11, cable l6 rocks the lever l3, so that the cam l'| Fig. 13 is a similar view showing .the latch depresses the plate I8 and dog 8 against the ten- 45 mechanism in released position, sionof the spring 23, thereby causing the dogto Fig. 14 is a perspective view of the latch dog, engage the ratchet teeth 1 of the shank B of the Fig. 15 is a perspective view of the follower brake pedal 5. The dog 8 through its'yieldable plate for the latch dog, 7 connection 20 with the plate, I 8 is permitted to Fig. 16 is a perspective view of the cam and ride over the ratchet teeth as the pedal 5 is de- 50 lever for operating the same, and, pressed to apply the brakes. The dog through Fig. 17 is a perspective view of the spring for its engagement with the ratchet teeth holds the the follower plate. pedal depressed and the brakes applied; until the In the drawings; wherein for the purpose of knob 30 ispushed inwardly which rocks the lever illustration, I have shown the preferred forms l3 and releases the plate l8 and dog 8,soth at the viii dog I is'moved, out of engagement with the ratchet teeth through action of the spring 28.

In Pig. 5, another form of the invention is sbownwhich diifers from the form shown in Fig. l, in that the plate II and dog I are podtioned in .the bracket II in a reverse direction and are .yieldabiy connected together by a coil spring 32.

instead of the U spring 20. In this form .the switch fl .is'mounted between the side walls of the bracket ii. a

In.1"igs. 6 and 7, I have shown still another 9 form of the invention which includes the bracket.

ll having formed between the side wallsthereof a cylinder I8 arranged at an angle with its lower 7 end disposed adjacent the shank 6 of the pedal 5. A locking dog 34 is slidably mounted in the cylinder andprojects through anopening 35 in the bottom thereof for engagementwith the ratchet teeth I. A head 30 is formed integral with the upper end of the dog and mounted on the dog between the head I 'and bottom of the cylinder is a coil spring 31 which normallygurges the dog away from engagement withcthe ratchet teeth.

Mounted within the cylinder on the opposite side of the head 36 is another coil spring 3|, which establishes yieldable connection, between the head of the dog and the ball 39 disposed in the upper end of the cylinder. A lever 40 is pivotally-connected to the upper end of the cylinder by .the pivot, pin 4| having a reversely bent end 42 which extends into thecylinder and terminates in acam for engagement with the ball 39. The free end of the lever-4li is connected to the flexiblecable i6 leading to the hand knob 30., The

head 36 has a laterally projecting lug 44 extending through a longitudinal slot 45 in the side of A the cylinder which guides the movement of the dog and actuates the switch 25.

In operation it will be seen thatby pulling the,

cable I the .lever 40 is rocked, -causing the cam 48 to engage and depress the ball 19 which through the spring 38 forces the dog 34 outward-'- 1y into engagement with the teeth 1 of the shank 6 of the pedal 5. When the dog isdepressed the spring 31 is compressed and when the lever 40 is rocked to release the ball, the spring 31 moves the dog out of engagement with the ratchet teeth. I

In Figs. 8, 9, and 10, I have shown still another form of the invention consisting of a-bracket 46 mounted within an opening in the floor board of the automobile in which is mounted a locking dog 41 pivotally mounted on the shaft 48 supported by the walls of the bracket. The upper end of V the locking dog is connected by the coil spring 49 to the end of the flexible cable i6 establishing yieldable connection betweenthe cable and dog.

"A coil spring 50 is mounted on the shaft 48 having one end connected to the pin it and its opnotch 54 adapted to engage with the edge of the openin'g ii'in the plate 56 through which the shank extends,to hold the hand knob in its extended position.

In operation, when the hand ,knob ,is pulled outward the cable I through the spring 49 rocks the locking dog ,41 into engagement with the ratchet teeth 1 of the shanki of the pedal. Uponreleasing the hand knob the spring Ell moves the locking dog out of engagement with the teeth and returns the hand knob to its normalposition. In Figs. 11 to 17 inclusive, a further modification of the invention is shown which consists of connection between the connecting bar l2 '0! the brake pedal 03 and the rocker shaft 44. The

' a bracket plate 40 which is attached to the frame of the vehicle by bolts ii at a point adJacent the rocker shaft 84 carries a link II which establishes connection between the brake rods 1 and 01' the rocker shaft' .4 providedwith a series oi I ratchet teeth 60 along its upper edge which are adapted to be engaged by the locking dog 1| pivotally mounted on the pin 1i projecting from the bracket plate 80. A follower plate 12 having side flanges 13 is pivotally mounted on the pin,"

in straddling relation to the dog 10 and disposed between the follower plate and. dog is a coil spring 14 seated in the recess 15 in the top ofthe 'dogvwhich yieldably holds the dog in engagement with the teeth 69 of the quadrant I. A shoulder 16 is formed transversely of the rear end of the top face of the dog, which serves'as an abutment for the rear end of the follower plate 12 and thereby limits the upward movement of the plate with respect to the dog. A coil spring 11 mounted on the pin 1i has one end attached, to one normally exerts an upward tension on the follower plate and serves to lift the dog out of engagement with the ratchet teeth 69 of the quadrant 68. A cam 18 normally depresses the'follower plate and is moved into and out of engageof the flanges 13 'of ,the follower plate and its opposite end to the bracket plate Eli. This spring ment with the follower plate bythe shaft 10 extending from the bracket plate, on which it is mounted, the shaft being turned by the depending lever which is connected to one end of the In operation, when the pull rod 82 is pulled. outwardly the lever 80 is actuated to rotate the shaft .19 and cause the cam 10 to depress the follower plate 12 against the tension of the spring 11, thereby permitting the spring 14 to hold the dog 10 in yielding contact with the teeth 88 of thequadrant 68 so as to secure the brake rods in their adjusted positions. To release the latch mechanism, the pull rod 82 1s pushed inwardly which actuates the lever 80 to release the cam 18, whereupon the followerplate is raised upwardly by the spring 11 which by reason of its rear end abutting the shoulder 16 of the dog-causes the dog to be'lifted out of engagement with the teeth 69 releasing the quadrant.

It is tobe understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and that certain changes in the shape, size and ar-- rangement of the parts may be made without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described-my invention, I claim:-.- 1. The combination with a foot brake pedal including a shank, of means for holding the brake applied, said means including a pivoted dog for engagement with said shank tohold the latter depressed, a pivoted follower plate yieldably connected with said dog, a springnormallyurging said dog out of engagement with'said shank,

and a manuallycontrolled lever for moving said follower plate and dog to operative position against the tension of said spring.

2. The combination with the braking mechanism of a vehicle, of a latching device for holding the braking mechanism in its applied position including a quadrant; adapted to move with the braking mechanism, said quadrant having a series of ratchet teeth on its upper edge. a pivotally mounted locking dog adapted to engage the teeth of said quadrant, a pivoted follower plate disposed over said dog adapted to lift said dog out of engagement with said teeth when swung upwardly, spring means normally urging said follower plate upwardly, manually controlled means for depressing said follower plate, and yieldable means disposed between said follower plate and locking dog.

3. The combination with the braking mechanism of a vehicle, of a latching device for holding the braking mechanism in its applied position, including a rack bar associated with the braking mechanism and moved thereby, a pivoted locking dog adapted to engage said rack bar, a follower plate disposed in straddling relation to said dog and pivotally mounted on the pivot of said dog, a spring yieldably connecting said dog and plate together, a spring normally holding said dog and plate in an inoperative position and means for depressing said follower plate to move said dog to an operative position.

- GODFRIED F. KLAMPFERER. 

